Boston Mill RD over Calapooia River
PoorLinn County, Oregon · 015 MI East Shedd · Structure no. 12287A001300696
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected October 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 126 ft
- 5 main spans
- Daily traffic
- 299
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Boston Mill RD over Calapooia River is a prestressed concrete slab carrying Boston Mill RD over Calapooia River in Linn County, Oregon. It was built in 1962, so it is 63 years old, older than the Oregon average of 49.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 299 vehicles a day, roughly 15% of them trucks, projected to reach 464 by 2041. The structure is 126 ft (38.4 m) long and 31 ft wide. If it were closed, the detour would be 10.6 mi (17 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Boston Mill RD over Calapooia River built?
It was built in 1962, making it 63 years old in 2025.
What condition is Boston Mill RD over Calapooia River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.
How much traffic does Boston Mill RD over Calapooia River carry?
About 299 vehicles per day (2021 count), of which roughly 15% are trucks.
How long is Boston Mill RD over Calapooia River?
The structure is 126 ft (38.4 m) long with a longest span of 25 ft (7.6 m) and a deck 31 ft wide.
Who owns Boston Mill RD over Calapooia River?
It is owned by the County Highway Agency.